<template>
    <v-row>
        <v-col>
            <v-btn block color="primary">Hello</v-btn>
        </v-col>
    </v-row>
    <v-spacer></v-spacer>
    <v-row>
        <v-col>
            <v-btn block color="success">World</v-btn>
        </v-col>

        <v-col>
            <v-btn block color="success">World</v-btn>
        </v-col>

        <v-col>
            <v-btn block color="success">World</v-btn>
        </v-col>
    </v-row>
</template>